Question: how can i animate the car..

hi.my program is this=

a:=[[2.5,0.05],[-2.5,1],[0,1],[-1.5,1],[-1,2],[1,2],[1.5,1],[0,1],[2.5,1],[2.5,0.05],[-2.5,0.05]]

plot(a)

r:=plot(a)

b:=[[0,2],[0,1]]

plot(b)

v:=plot(b)

c:=plot([-1+1/2*sin(t),1/2*cos(t),t=0..2Pi],scaling=constrained])

d:=  plot([1+1/2*sin(t),1/2*cos(t),t=0..2Pi],scaling=constrained]) 

display(r,c,v,d) 

i want animate it.Who can help me? 

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